Box-nailing mechanism.



E. 0. NORTHRUP.

BOX NAILING MECHANISM.

APPLICATION FILED FEB;15,1911. 1 1 1 2,083. Patented Sept. 29, 1914.

3 SHEETS-SHEET l.

illi] E. G. NORTHRUP.

BOX NAILING MECHANISM.

APPLICATION FILED FEB. 15,1911.

Patented Sept. 29, 1914.

3 SHEETS-SHEET 2.

E. G. NORTHRUP.

BOX NA-ILING MECHANISM.

APPLIGATION FILED FEB.15,1911.

1,1 12,083, Y Patented Sept. 29, 1914.

a SHEETQ'SHEET 3.

W meass Inve-ntar 0/ Elmer 6.1V072hru a.

IHE NORRIS PETERS C0,. PHOTO LITHlL WASHINGTON. :2. L1

the machine.

UNITED STATES PATENT OFFICE.

ELMER c. non'rnnur, or SAN FRANCISCO, CALiFORN IA, ASSIGNORTO AUTOMATIC MACHINE COMPANY, OF SAN FRANCISC FORNIA.

To all'whom it may concern: 1

Be it known that T, ELMER G. NORTHRUP, a citizen of the United States, residing at San Francisc in the county of San Francisco and State of California, have invented a new and useful Improvement in Box Nailing Mechanism, of which the following is a specification.

In a former application of mine filed February 2nd, 1911, Serial No.-606,212, which is a division of a previous application on box making machine, filed Feb. 23, 1909, Ser. No. 479,610, I have shown and described a nailing mechanism, and the present application is an improvement over the mechanism shown in said former applications.

One of the main objects of the present invention is to improve the nail picker mecha- DISH}.

is afront elevation of the upper portion of Fig. 2 is a plan view of a portion of the nail pan and nail chutes. Fig. 3 is a section on line ar -m Fig. 2. Fig. 4 is a plan view of a portion of thenail chute below the nail pan. Fig. 5 isa section on line 0 w Fig. i. Fig. 6 is a front elevation of the nail picking mechanism, showing the parts in one position. F ig. 7 is a View similar to Fig. 6, showing the parts in another position. Fig. 8 is a face view of the cam which operates the picker rods. Fig. 9 is a plan View of the nail chutes. Fig. 10v

j is a perspective view of the lower endof, a

nail chute, showing the adjacent portion of the picker mechanism, showing the position of the parts immediately before the 'nail is released. Fig. 11 is a view similar to Fig.

10, showing the position ofthe parts immediately after the nail is released. r I

Secured to a cross head 6 are yokesf28, and one of the rear yokes 28, as shownin Fig. 1, is adapted to strike the lever 26 and lift the latter as the yoke moves up with the cross head when the latter is operatedby the cams 17. Thus when the lever 26 is tilted upwardly, it lifts the arm 23 and the feeler 21 when the cam portion 19 is oper ative against the rollers 16, and "when. the cam portion 20 moves under the roller 16 the lever 26 is allowed to retract and is pulled down by means of a coil'compres'sion spring 29 on the arm 23, the upper end of L which bears against one of the bearings 24 0, CALIFORNIA, A CORPORATION or CALI- BOX-NAILING, MECHANISM.

Specification of Letters Patent. Patented Sept. 29, 1914- Application filed February 15, 1911. Serial NO. 608,816.

and its lower end bears against a washer 30 supported by a pin 31 in the arm 23. Operated bodily with the cross head 6 and yokes 28 arethe nail mouths 32, the nail mouths being supported by clips 33 secured by thumb nuts 34;,to right and leftcross bars and 35., the cross bar 35 being secured to one side of yoke 28 and cross bar 35 being connected to the other side of yoke 28. Both c-ross bars 35 and 35 are in line with each other; Extending down from each nail mouth 32 is atube 36, the several tubes leading'to respective nail chucks 87.

a By referring to Fig. 2 it will be seen that the cross bar- 35 supports the left hand set of nail tubes 36, while the cross bar 35. supports the right hand set of nail tubes.

This enables either set of nail tubes to be I taken down without disturbing either set. Referring to the drawings :Figure 1 and as the latter is oscillated by the links 5 The nails are placed in the nail pan 2,

they will gradually work into such position that they will hang down through the slotted nail chute 57 as shown in Fig. 9. In order to facilitate the passage of the nails into the grooves 53, I provide beveled projections 5 between' the grooves. Alternate bars 55 are attached to cross bars 56, while intervening bars55 are secured to cross bars 56. An adjustable cross bar 55 having different sized holes, indicated at 58*, Fig. 3, is placed over the bars 55. These holes permit the heads of the nails to pass; the size of the nails being gaged by the size hole placed over the slot 53. Below the bars 55 and forming. practically a continuation thereof are bars 57 between which are grooves 53 which form continuations of the grooves 53. The cross bar 56 is provided with notches .58 to permit-the heads of the nails to pass through, as indicated in Fig.3. 1 Cross bars 59 are attached to alternate bars 57, while cross bars 60. are attached to the intervening bars 57, sothatby shiftingthe bars 59 and 60 relatively to each; other the width of the grooves 53. may be varied, As shown in Fig. v5, bars 59 and 60 "are provided with notches 61 which permit theheads of the nails to pass. At their lower ends the bars 57 are provided with narrow tongues 62 onto which the heads of the nails are ultimately brought and which isupport the nails until they: are. removed therefrom by the picker mechanismpf- The picker mechanism is shown in detail in Figs. 6, 7 10 and 11, and comprises two rods 63 and 64 which are slidably mounted in bearings- 65 formed on brackets 66 and 67. Mounted in the bracket 67 is a stationary shaft 68, and rotatably mounted on the shaft 68 is a cam 69 operated by a sprocket 70. The cam 69 operates against the ends of the rods 63 and 64- and reciprocates the rods in.

a manner to be described. The cam 69, as shown in Fig. 8, is provided with three cam faces7 1, 72 and 73 which are spaced the same degree apart and are the same angular degree of width, but the cam faces 71 and 72 extend only approximately half of the radius of the cam 69, while the cam face 73' extends to the periphery of the cam'69. Thus the cam 73 has a path of movement against the ends of both rods or and 63, while the cam faces 71 and 72 have a path of movement only against'the rod 6 1, they being too short to reach the rod 68. Hence as the cam 69 is rotated, during each complete revolution thereof, it will reciprocate the rod 64: three times and will reciprocate the rod 63 one time. Slidable on the rods 63 and 6e are brackets 74, in one arm of which a picker 7 5 is slidably mounted and is provided with a cone-shaped point 76 which is yieldingly held projected by a compression spring 77. The rods 63 and 64 are provided with perforations 78 which are adapted to contain pins 79, and compression springs 80 are arranged between pins 79 and the brackets 7et. The pointed ends of the picker 75 do not bear against the brackets I 74:, as might be thought from an inspection of Figs. 6 and 7, but are at one side thereof. Referring to Figs. 10 and 11, as the nails arrive at the lower end of the nail chutes, thenail at the lowest end thereof rests with its head on a shoulder 81 formed on the brackets 74: and hangs down at a slight angle from the vertical, while the next nail hangs vertically. The lower end of the nail chute is beveled, as shown, so that the lower nail, upon arriving at the beveled end, drops down until it is suspended solely: by the shoulder 81. As the rod 64 moves forward it projects the pointed end 76 of the picker between the two lowest nails, thereby tilting the lowest nail off from the supporting shoulder and-the shoulder 81 at the same time moving away, whereupon the nail thus released drops down into the nail mouth 32. If the nail shouldstick for any reason, the

picker 75 is permitted to yield by reason of the spring 77 so that it does not become damaged. Springs 81 "hold the rods 68 and 64; against the cam 69,

- 1n nailing some boxes more nails are re quired 'for the bottom than for-either of the sides, andasfor-some boxes the sides require more nails'than the bottom, I have provided the outer rod 63 which is operated once in every revolution of the cam to fur-' nish more nails, each of the pickers 75 being adapted to release one nail each. time the picker is operated, and as the pickers are operated by the pins 79 it is apparent that when there is no pin 79 in position the picker will not be operated. In other words,

the rod 6% is equipped with pins 79 to operate certain of the pickers, which pickers are operated three times at each revolution of the cam, while the rod 63 is provided with pins 7 9 to operate certain other pickers which would not be operated by rod (it, such other pickers being operated in addition to those operated by rod 61 at every third revolution of rod 6ft or whenever the lon cam portion 73 actuates the rod 63. Thus whenever the rod 63 is actuated, more pickers are operated and more nails are delivered. Obvio-usly, the point at which the nails are driven is determined by the chutes through which they are discharged into the chucks, and the manner in which the desired chutes are selected is by placing pins 79 in rods 63 and 6st to operate pickers which lie over the nail mouths associated with the chutes into which nails are to be delivered.

hat I claim is 1. In a. box nailing machine, an inclined nail chute, the lower end of the nail chute having a short steep inclination to receive part of the head of the nail, and a bracket slidable transversely of the lower end of the nail chute, said bracket being formed with a shoulder sufficiently abrupt to receive one side of the head of the nail, said shoulder and steep inclination acting mutually temporarily in the operation of the machine to support the nail, whereby when the bracket moves out of line with the nail chute the shoulder of said bracket will be removed from the head of the nail and the steep inclination of the end of the nail chute will allow the nail to slide off and the latter will fall.

2. In a box nailing machine, an inclined nail chute, the lower end of the nail chute having a short steep inclination to receive part of the head of the nail, a bracket slidable transversely of the lower end of the j nail chute, said bracket being formed with a shoulder sufiiciently abrupt to receive one side of the head of the nail, said shoulder and steep inclination acting mutually temporarily in the operation of the machine to support the nail, whereby when the bracket moves out of line with the nail chute the shoulder of said bracket will be removed from the head of the nail and the steep inclination of the end of the nail chute will allow the nail to slide off and the latter will fall, and a picker comprising a conical member movable with said bracket transversely of the nail chute and having path of movement at one side of said bracket and movable betweenthe two lowernails as the bracket moves away from the nail chute to spread apart the lowermost nail and to retain the next higher nail in the nail chute when the lower end of the nail chute is uncovered by the bracket.

3. In a box nailing machine, an inclined nail chute, the lower end of the nail chute having a short steep inclination to receive part of the head of the nail, a bracket slidable transversely of the lower end of the nail chute, said bracket being formed with a shoulder sufliciently abrupt to receive one side of the head of the nail, said shoulder and steep inclination acting mutually temporarily in the operation of the machine to support the nail, whereby when the bracket moves out of line with the nail chute the shoulder of said bracket will be removed from the head of the nail and the steep in clination of the end of the nail chute will allow the nail to slide off and the latter will fall, and a picker corprising a conical mem ber movable with said bracket transversely of the nail chute and having a path of movement at one side of said bracket and movable between the two lower nails as the bracket moves away from the nail chute to spread apart the lowermost nail and to retain the next higher nail in the nail chute when the lower end of the nail chute is uncovered by the bracket, said picker being spring supported and arranged to yield rearwardly in a longitudinal direction if its normal bodily movement is positively obstructed.

4. In a box nailing machine, a nail chute, a plurality of slidably supported rods extending transversely at the lower end of the nail chute, a plurality of brackets slidable on said rods, means coacting with the rods and slidable brackets for causing various brackets to be moved when the rods are operated, a picker carried by each bracket and movable between the two lower rails of the nail chute, each bracket having a shoulder constructed and arranged to receive and support the head of a nail when the shoulder is in line with the nail chute, and means for operating one of said rods a definite number of times in a given period, and for operating the other rod a less number of times in the same period.

5. In a box nailing machine, a nail chute, a plurality of slidably supported rods extending transversely at the lower end of the nail chute, a plurality of brackets slidable on said rods, removable abutments on the rods for moving the brackets, a picker carried by each bracket, and movable between the two lower nails of the nail chute, each bracket having a shoulder constructed and arranged to receive and support the head of a nail when the shoulder is in line with the nail chute, and a cam at the end of said rods, said cam having three cam faces, two of said cam faces having a less radius than the other, all three cam faces having a path of movement against the end of one of said rods, the longer cam face having a path of movement against the end of the other rod also, whereby one of said rods is operated three times for each revolution of the cam and. the other rod is actuated once.

In testimony whereof, I have hereunto set my hand at Los Angeles California this 21 day of January 1911.

, ELMER o. NORTHRUP. In presence of GEORGE WALKLEY, FRANK L. GRAHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. a 

